Harrow drawbar and hinge therefor



E. J. MASON ET AL HARROW DRAWBAR AND HINGE THEREFOR Filed Jan. 27, 1950 May 12, 1931.

7Illlllrl'llllll Tll'lllllri/Il/Illd'l lrlllirltlIIIllilllllillllllltrlfllllll r V ferred form of the invention has been shown.

- reference,1 designates the middle'sectionand 2 designates the endsections of a; drawbar;

' Patented May 12, 1931 time STATES,

: ELI J. Mason Am) Heather L; ciiorn'o'r rowmn; MIL ER, reams- TRATOR or 'sArn' HERBERT L. onorsr, naonnsnn, Assmnoit 'rosarn Mason- HAR-now'nnnwBAia snnrriireiignnanron I I I i 7 Application filed January 27,: 1930; f S'eiia'l at. 423,843.

"This invention relatesto harrow drawbars of that type made'up of hingedly connected sections, one of the objects of the invention being to PI'OVlClGlllIlg'QS of novel construc-.

5 tion for connecting the sections, these hinges having means whereby thepull exertedin drawing the harrow can'be distributed to the pintles of the hinges so that'the several sec tions of the drawbar willnot sag rearward 10 ly while the structure is in use. I

Another object is to provide a drawbar structure that constitutes an improvement upon thedevice disclosed inPatent 1,430,825, issued to Mason and Lund. I g

With the, foregoing; and other objects in view which will appearas the description pr oceeds,"the invention resides inthe combination and arrangementof parts and in the details of construction hereinafter-described in the precise embodiment of the-invention herein disclosed may be made within the-v scope of what is claimedwithout departing from the spirit of the invention. I In the accompanying drawings the pre Figure 3 is a horizontal section" through-y v i -turn,- can. be connected by'links 17 to the middle portion of the sectional. These parts are all so proportioned that when a pull is portions ofone' of the hinges.

It is essential that thcsesections be connected to allow the drawbar and the sectionalharrow connected thereto to pass through a relatively narrow space,.such as a gate opening.

While hinges have been provided for this purpose, it has-been found that theyhave been subjected, to excessive strain while, the

device is inuseso that they have not stood;

up under working conditions for any considerable length of ti i V Inthe present instance eachhinge is de-i signed primarily to withstand the rough and claimed, it being understood that changes g V v a the leaves 3are.fattachedto the sections 2.- Figure 2 is an enlarged plan viewofione of bymeans of hingesso that they can be folded" danger of distorting orbreaking the hinges.

usage towhi'ch'ithe drawbaris'subjectedii H show-n particularly in Figures 2 and 3,:each

hingeisformed ofplates or leaves 3and alrespectivelyiwhich can be cut away iat their centers as shown at 5 to reduce their weight 3 and cjost ofproduction, Iilach leaf 3 is provided at one end with spaced sleeves 6 located at the frontand back edges of the leaf, each leaf beingreinforced'bya web 7 as shown.

Interposed between and bearing against the inner ends of the sleeves 6 are additional The pintle has its ends fiuslrwith the exposed located at the frontend of the bolt whilethe back. end thereofis screw-threaded and engagedby a nut 13 locatedthereto by any suitable means'such as a cotter pin 14. The eye 12 and the bolt 13 cooperate to hold the pintle endportions ofthe drawbar section 1 while Thus section; 2 can be pulled inwardly onto the section 1.' Links 15 are secured in the ends fthe-sleeves 6 and extending through i said pintle is a draft bolt 11. An eye 12 is 7 i I 10 against longitudinal; displacement relaftive to the sleeves 6and8;

In practice the leaves 4 are attached tothe exerted on the ring161power will be trans-r amittedthrough allfof the links to the center. of the. bar Q1 and to the eyes 12., Thus the drawbarwill be pulled forwardly not only at thecenter of the section 1 but also at the centers of the hinges and. it becomes possible for the. drawbar to withstand all severest/rain to which it is subjected while in use Without While the drawbar has been shown of three hingedly connected se-ctionsit is to be understood that it can be madeof more than three sections; In every case, however, the sections are connected by hinges such as described and all of the hinges are connected in turn to the rin 16.

at is claimed is:

The combination with relatively movable sections of a harrow drawbar, of ahinge connection between the sections including leaves attached to the respective sections, alining sleeves thereon, a tubular pintle extending through all of the sleeves for transmitting transverse thrust from one section to the other, a draw bolt extending through the pintle and relieved thereby from transverse thrust, and a draft element attached to the front end of the bolt, said bolt constituting means for transmitting longitudinal pull from the draft element to the back ends of the I hinges at the sleeves.

In testimony that we claim the foregoing as our own, we have hereto aflixed our signatures. a

. ELI J. MASON.

HERBERT L. CROFT. 

